Giving off radiation.
The emission of particles during the disintegration of the nuclei of radioactive elements. The emissions include alpha particles, beta particles, and gamma rays.
With a nucleus which disintegrates and gives off energy in the form of radiation which can pass through other substances.
Capable of spontaneous emission of alpha, beta, or gamma rays as a result of the disintegration of the nucleus of an atom.
Term used to describe substances that give off radiation.
Having the characteristics of radioactivity.